Updated 9 Oct 2010

Size and health of new oaks

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Size and health of new oaks

This webpage tries to keep track of the growth and health of 250 oak saplings in a plantation in Southern England. They were acorns in the year 2000, collected from the famous Major Oak in Sherwood Forest, which is perhaps 1,000 years old and may have been used by Robin Hood around 1250.

Some of the 8-year old oaks in our plantation at Bear Mead
Tree P5
Tree R5
Tree A7
Trees G8 and G7
Tree A8
Tree K6

Wife Rosie with sapling R5 (acorn in 2000). Note herbicided area round base of tree, to control long grass and deter field voles with kestrel attack.

Quercus robur sherwoodii

Height and girth of 250 oak saplings in our 7 acre plantation at Bear Mead in Dorset, UK. Details of the progress of leafing, a health check, the layout of the saplings, acorns produced and size distribution graphs are included.

The saplings were acorns in Oct 2000, some in 2002. All acorns came from the Major Oak in Sherwood Forest. Spacing is 10 metres.

Many saplings were lost by the attack of field voles around October 2004. In some cases this was noticed immediately as the young trees were horizontal. In other cases a few roots survived, but the trees gradually died over a year. The saplings were replaced when spares were dormant and the weather dry. Many spares are available and planted around the periphery of the plantation.

The vole problem can be solved using kestrel boxes and herbicide. The average kestrel family eats nearly 300 voles in a month. A bare patch round each tree lets the hunting parents see the vole. We also have a barn owl box.

Read the Oak Blog 1996-2007.

More information from:

Author on the spoil heap! A well was dug to supply water to the oaks in pots before planting out. First year the bare earth had a crop of poppies.

Layout of Plantation

258 oaks.
Upper case=OAK, w=willow, ash=ash, co=conker, sp=spindle, bi=birch,
asp=aspen, Pm=poplar male, Pf=poplar female.
 *=deer-chewed, x potted spares in leaf, xxx=new hedge, ^=leaf soon, ?=un-moved
   w  w  w  w  w  w  w  w  w  w  w  w  w  w  w  w  w  w  w  w  w  w  w  w  w  w 
 GATE ----------------|
  ash                 |                                                      ash
  ash   A1       A2   |  empty     A4       A5       A6       A7       A8    ash
  ash                 |                                                       Pf
  ash   B1       B2   |   B3       B4       B5       B6       B7     empty   ash
   NB                 |                                                      ash
        C1       C2   |   C3       C4       C5       C6       C7       C8    ash
   NC                 |                                                      ash
        D1       D2   |   D3       D4       D5       D6       D7       D8    ash
   ND                 |                                                      ash
        E1       E2   |   E3       E4       E5       E6       E7       E8      
   NE                 |                                                      Pm
        F1       F2   |   F3       F4       F5       F6       F7       F8      
   NF                 |                                                        
        G1       G2   |   G3       G4       G5       G6       G7       G8    Pf
   NG                 |                                                        
        H1       H2   |   H3       H4       H5       H6       H7       H8      
   NH                 |                                                      Pm
        I1       I2   |   I3       I4       I5       I6       I7       I8      
   NI                 |                                                      Pf
        J1       J2   |   J3       J4       J5       J6       J7       J8      
   NJ                 |                                                      Pm
        K1       K2   |   K3       K4       K5       K6       K7       K8      
   NK                 |                                                      Pf
        L1       L2   |   L3       L4       L5       L6       L7       L8      
   NL                 |                                                      Pm
        M1       M2   |   M3       M4       M5       M6       M7       M8      
   NM                 |            sp                                        Pf
        N1       N2   |   N3    bi w.       N5       N6       N7       N8    se
   NN                 |      sp w POND w sp                                  at
        O1       O2   |   .       WELL   bi O5       O6       O7       O8    Pm
   NO*                |                                                        
        P1       P2   | SCRAPE     P4       P5       P6       P7       P8    Pf
   NP                 |        |-------|                                       
        Q1*      Q2   |   Q3   |   Q4  |    Q5       Q6       Q7       Q8      
   NQ                 |        |NURSERY|                                     Pm
        R1       R2   |   R3   |   R4  |    R5       R6       R7       R8      
   NR                 |        |       |                                     Pf
        S1       S2   |   S3   |   S4  |    S5       S6       S7       S8      
   NS                 |        |-------|                                     Pm
        T1*      T2   |   T3       T4       T5       T6       T7       T8      
   NT                 |---------|                                            Pf
        U1*      U2       U3    |  U4       U5       U6       U7       U8      
   NU                           |                                              
        V1*      V2       V3    |  V4       V5       V6       V7       V8    Pm
   NV                           |                                              
        W1       W2       W3    |  W4       W5       W6       W7       W8      
   NW                           |                                            Pf
        X1       X2       X3    |  X4       X5       X6       X7       X8      
   NX                           |                                            Pm
        Y1       Y2       Y3    |  Y4       Y5       Y6       Y7       Y8      
   NY                           |                                            Pf
        Z1*      Z2       Z3    |  Z4       Z5      dead      Z7       Z8      
   NZ                           |                                            Pm
        Za1*     Za2      Za3   |  Za4      Za5      Za6      Za7      Za8     
   NZa                          |                                             x
        Zb1*     Zb2      Zb3   |  Zb4      Zb5      Zb6      Zb7      Zb8    x
x  NZb                          |                                             x
x ash*  Zc1      Zc2      Zc3   |  Zc4      Zc5      Zc6      Zc7      Zc8    x
x                               |                                             x
x ash   ash* WA       co     co |  co    co      asp      WF       WG         x
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Satellite photo of the Plantation, taken May 2007. Position of saplings shown by herbicide rings around each tree. Hedges around the field are of hawthorn and blackthorn with mature ashes and a couple of oaks.

Height and Girth of Oaks

    258 oaks within deer fence. 36 have died and been replaced so far (most due to vole attack) ID=Identity number, H=Height (cms), D=Diameter (mms), G=Girth (mms) S=Shape (U=Upright, B=Bushy) =x= sapling died and replaced MT=Memorial Tree, LMT=Living MT March 2004 April 2006 May 2008 Comments ID H D S H D H G Planted out 20 Feb-16 Mar 2004, 142 from 10 litre pots A1 28 9 B =x= 40 16 100 105 Replaced 2 Dec 04 A2 75 16 B 155 39 230 230 A3 30 9 B 70 27 =x= 80 - Replaced 14 May 08 A4 24 5 U 30 11 40 45 A5 87 14 B =x= 25 13 35 60 Replaced 3 Dec 04 A6 25 6 U 85 22 230 190 A7 40 11 B 155 33 260 205 A8 107 12 U 215 39 270 202 B1 30 12 B 120 32 200 210 B2 82 12 B 90 28 180 155 B3 36 7 B 50 18 90 115 B4 21 6 B =x= 25 20 70 110 Replaced 3 Dec 04 B5 28 9 B 110 25 180 170 B6 18 6 B =x= 30 9 80 60 Replaced 3 Dec 04 B7 59 12 B 155 29 230 200 B8 45 10 B =x= 50 12 =x= 60 - Replaced 3 Dec 04, 14 May 08 C1 75 12 B =x= 65 13 150 120 Replaced 20 Feb 05 C2 93 16 B 95 23 170 180 C3 37 10 B 40 12 130 100 C4 100 14 U 110 25 150 155 C5 64 15 B 105 30 240 195 C6 44 15 B 120 38 180 205 C7 95 12 U =x= 25 13 80 75 Replaced 3 Dec 04 C8 35 14 B =x= 60 15 140 135 Replaced 3 Dec 04 D1 23 6 B 35 11 120 100 D2 63 13 B =x= 45 20 140 120 Replaced 2 Dec 04 D3 37 12 B =x= 25 21 90 145 Replaced 2 Dec 04 D4 60 10 B 65 15 170 115 D5 30 9 B 45 19 150 132 D6 37 6 B 100 23 200 190 D7 70 10 U 85 22 170 130 D8 35 8 B 100 24 270 185 E1 65 13 B 155 37 240 235 E2 25 7 B 50 19 110 115 E3 45 12 B =x= 30 12 110 120 Replaced 2 Dec 04 E4 38 9 B =x= 35 16 90 140 Replaced 29 Sep 05 E5 62 14 B 85 25 90 130 E6 44 11 B =x= 30 16 170 150 Replaced 29 Sep 05 E7 52 11 B 60 22 90 105 E8 92 15 B 145 35 180 210 F1 85 12 U 75 21 90 110 F2 32 7 B 60 21 140 135 F3 43 10 B =x= 45 14 90 100 Replaced 29 Sep 05 F4 79 9 B 90 30 160 180 F5 20 5 U =x= 55 13 110 100 Replaced 29 Sep 05 F6 71 16 B =x= 50 14 140 125 Replaced 3 Dec 04 F7 57 11 B 100 27 150 150 F8 57 8 B 140 31 240 195 G1 20 5 B 60 20 150 150 G2 90 11 U 70 20 230 155 G3 55 9 B 145 31 250 200 G4 50 9 B 60 20 190 140 G5 52 9 U 75 22 120 170 G6 29 9 B 70 30 =x= 45 50 Replaced 16 Nov 07 G7 95 11 U 200 31 300 230 G8 53 14 B 100 29 230 210 H1 60 9 B 70 16 110 112 H2 63 9 B 115 30 140 135 H3 57 10 B =x= 20 9 140 112 Replaced 29 Sep 05 H4 71 12 B 90 36 210 160 H5 72 14 B =x= 30 7 55 80 Replaced 3 Dec 04 H6 40 9 B 120 27 230 210 H7 65 10 U 135 26 200 155 H8 41 11 B 55 18 110 110 I1 50 11 B 110 25 210 155 I2 80 13 B 130 38 150 190 I3 36 7 B 90 21 180 140 I4 66 10 B 75 22 200 165 I5 47 9 U 70 18 210 125 I6 37 9 B 75 23 210 180 I7 51 12 B 120 23 270 175 I8 68 13 B =x= 25 6 25 25 Replaced 3 Dec 04 J1 38 8 B 110 25 170 135 J2 58 9 U 120 27 140 180 J3 92 15 U 115 30 240 175 J4 46 7 B 70 23 160 150 J5 53 7 U 60 14 100 115 J6 55 10 B 110 31 230 215 J7 20 7 B 65 20 155 170 J8 30 10 B 55 15 60 75 K1 34 9 B 55 25 190 180 K2 61 9 B 115 32 230 225 K3 45 8 B 55 15 60 60 K4 28 6 U 40 17 70 105 K5 38 6 B 35 17 110 110 K6 61 10 B 140 28 260 195 K7 51 16 B 85 29 140 180 K8 28 5 U 60 11 110 80 L1 47 10 B 145 33 210 215 L2 49 10 B 100 25 220 210 L3 55 8 B =x= 35 15 160 135 Replaced 9 Feb 05 L4 50 8 B 70 22 130 150 L5 41 7 B 45 12 110 75 L6 65 14 B 110 38 130 205 L7 55 8 B 105 25 220 175 L8 63 11 B 85 34 150 185 M1 48 9 B 55 16 180 115 M2 40 9 B =x= 35 19 140 142 Replaced 2 Dec 04 M3 40 8 B =x= 45 13 100 110 Replaced 28 Sep 05 M4 34 9 B 115 25 220 180 M5 65 12 B 120 34 250 200 M6 48 9 B 150 34 290 232 M7 80 14 B 120 32 230 220 M8 50 8 B 130 21 170 120 N1 57 9 B =x= 30 10 140 140 Replaced 24 Nov 04 N2 42 8 U 115 24 200 183 N3 67 11 B 125 32 180 210 N4 --- -- - --- -- --- --- N5 36 11 B 40 12 60 84 N6 48 7 U 100 25 200 174 N7 50 11 B 130 30 200 145 N8 21 6 B 30 8 =x= 20 50 Replaced 17 Nov 07 O1 33 7 B 70 23 170 167 O2 54 7 B 140 32 210 225 O3 --- -- - --- -- --- --- O4 --- -- - --- -- --- --- O5 31 5 B 75 23 130 148 O6 37 6 U 70 21 165 143 O7 49 8 B 160 25 250 168 O8 49 6 U 115 19 140 97 P1 30 6 B 150 36 190 228 P2 30 7 B 115 31 130 180 P3 --- -- - --- -- --- --- P4 50 6 U 100 22 190 158 P5 56 8 U 182 31 290 230 P6 42 6 B 75 19 190 166 P7 39 6 B 110 17 220 115 P8 36 6 B 60 16 200 128 Q1 31 5 B 90 22 220 173 Q2 36 8 B =x= 25 11 130 102 Replaced 29 Sep 05 Q3 37 9 B =x= 35 10 180 105 Replaced 2 Dec 04 Q4 45 7 U 80 18 120 132 Q5 32 9 B 150 23 230 175 Q6 34 6 B 65 20 170 130 Q7 37 7 B 35 19 80 100 Q8 35 5 U 140 28 230 210 R1 30 7 B 65 23 170 130 R2 24 8 U 75 20 170 160 R3 44 7 B 50 18 100 142 R4 28 7 U 105 24 220 210 R5 28 7 B 125 30 310 235 R6 26 8 B 45 25 70 120 R7 32 6 B 55 29 160 190 R8 40 8 B 120 22 210 190 Planted out 27 Nov 2004, 56 from 10 litre pots S1 --- -- - 45 21 150 120 S2 --- -- - 75 30 130 170 S3 55 11 U 105 23 200 185 S4 43 6 B 55 16 130 136 S5 --- -- - 65 22 210 170 S6 --- -- - 40 18 180 125 S7 --- -- - 70 15 300 135 S8 --- -- - 50 13 150 150 T1 --- -- - 50 17 200 125 T2 --- -- - 55 17 190 150 T3 --- -- - 55 17 120 140 T4 --- -- - 55 13 150 130 T5 --- -- - 35 21 190 125 T6 --- -- - 30 21 140 110 T7 --- -- - 45 13 90 95 T8 --- -- - 65 20 120 135 U1 --- -- - 55 17 130 120 U2 --- -- - =x= 30 8 90 130 Replaced 2 Dec 04 U3 --- -- - 25 10 80 75 U4 --- -- - 45 15 140 130 U5 --- -- - 35 7 80 55 U6 --- -- - 90 18 240 160 U7 --- -- - 55 18 180 170 U8 --- -- - 70 14 150 105 V1 --- -- - 50 12 140 115 V2 --- -- - 45 12 170 110 V3 --- -- - 40 18 90 100 V4 --- -- - 45 11 55 70 V5 --- -- - 70 16 150 145 V6 --- -- - 55 16 140 140 V7 --- -- - 35 13 140 105 V8 --- -- - 85 15 180 135 W1 --- -- - 50 14 80 100 W2 --- -- - 30 10 110 100 W3 --- -- - 40 8 90 110 W4 --- -- - 45 14 90 105 W5 --- -- - 50 19 =x= 135 100 Replaced 11 May 08 W6 --- -- - 35 9 45 50 W7 --- -- - 65 14 180 120 W8 --- -- - 65 17 120 115 X1 --- -- - 45 19 160 160 X2 --- -- - 40 8 =x= 35 50 Replaced Nov 07 X3 --- -- - 50 12 90 90 X4 --- -- - 80 21 240 210 X5 --- -- - 55 15 110 115 X6 --- -- - 25 7 =x= 50 45 Replaced 15 Nov 07 X7 --- -- - 40 11 170 150 X8 --- -- - 60 12 170 140 Y1 --- -- - 35 12 60 95 Y2 --- -- - 45 10 100 100 Y3 --- -- - 35 7 60 65 Y4 --- -- - 35 11 70 80 Y5 --- -- - 35 10 120 110 Y6 --- -- - 80 15 280 190 Y7 --- -- - 70 13 190 135 Y8 --- -- - 35 8 110 80 Z1 --- -- - 60 12 160 100 Z2 --- -- - 45 10 110 125 Z3 --- -- - 35 10 75 95 Z4 --- -- - 50 13 180 130 Z5 --- -- - 40 9 100 100 Z6 --- -- - 55 14 =x= dead - Not yet replaced Z7 --- -- - 30 9 80 80 Z8 --- -- - 35 12 90 128 Za1 --- -- - =x= 40 9 180 85 Replaced 29 Sep 05 Za2 --- -- - 30 8 100 65 Za3 --- -- - 35 12 220 105 Za4 --- -- - 30 10 140 150 Za5 --- -- - 45 16 110 112 Za6 --- -- - 30 12 100 96 Za7 --- -- - 35 11 150 120 Za8 --- -- - 20 5 100 72 Zb1 --- -- - 30 15 130 170 Zb2 --- -- - 30 13 60 100 Zb3 --- -- - 25 8 55 60 Zb4 --- -- - 40 13 140 140 Zb5 --- -- - 35 12 150 125 Zb6 --- -- - 30 6 60 90 Zb7 --- -- - 35 9 40 65 Zb8 --- -- - 35 10 65 80 Zc1 --- -- - 40 8 170 105 Zc2 --- -- - 65 15 280 185 Zc3 --- -- - 60 15 140 150 Zc4 --- -- - 80 16 200 160 Zc5 --- -- - =x= 30 15 160 110 Replaced 29 Sep 05 Zc6 --- -- - 70 14 140 105 Zc7 --- -- - 45 9 80 70 Zc8 --- -- - 60 11 80 70 Planted out 20 Oct 2005, 32 as spares from 10 litre pots NB --- -- - -- -- 140 95 NC --- -- - -- -- 90 87 ND --- -- - -- -- 110 115 NE --- -- - -- -- 140 110 NF --- -- - -- -- 100 92 NG --- -- - -- -- 75 83 NH --- -- - -- -- 70 80 NI --- -- - -- -- 70 90 NJ --- -- - -- -- 180 85 NK --- -- - -- -- 90 100 NL --- -- - -- -- 120 95 NM --- -- - -- -- 140 80 NN --- -- - -- -- 70 83 NO --- -- - -- -- 130 117 NP --- -- - -- -- 100 90 NQ --- -- - -- -- 40 40 NR --- -- - -- -- 110 80 NS --- -- - -- -- 70 90 NT --- -- - -- -- 55 60 NU --- -- - -- -- 95 70 NV --- -- - -- -- 65 80 NW --- -- - -- -- 35 55 NX --- -- - -- -- 70 80 NY --- -- - -- -- 70 73 NZ --- -- - -- -- 50 80 NZa --- -- - -- -- 90 80 NZb --- -- - -- -- 60 55 WA --- -- - -- -- 35 80 WF --- -- - -- -- 95 75 WG --- -- - -- -- 45 45 Total 36955 33309 Average 144 131

Distribution Graphs

Height and Girth distribution of saplings.
Acorns were potted in 2000 & 2002.
Most were acorns in 2000.
Most were acorns in 2000 (replacements were 2002).
Most were acorns in 2002.

Acorns

A check for acorns on the young trees.
1=a couple, 2=several, 3=a lot.


Sep 08     Sep 09                         Sep 10
A8=(1)     C3=(2) G7=(2) L6=(3) S5=(2)    C3 C6 H6 H7 I1 I3 K7 L1 L6 NF NO
G7=(1)     D2=(2) I1=(1) R3=(1) T3=(1)    Q1 S5 Z2 (all "lots")
L1=(1)     E1=(1) I3=(1) R5=(2) W5=(2)    93 (all "a few")
P4=(3)     F8=(1) L1=(3) S2=(1)           107 trees with acorns, 42%
                                          Acorns collected: 2,400

Health check

23 may 2008
Sample size 254.
Healthy trees 226.
Leaf shrivel or similar 20.
More serious sickness 7.
Dead tree 1.
Oaks replaced 2004-2008, 36
29 jun 2008
Sample size 254.
Healthy trees 244.
Leaf shrivel or similar 7.
More serious sickness 3.
Dead tree 0.
Oaks replaced 2004-2008, 37

23 may 2008 | 29 jun 2008
E2 a lot of shrivelled leaves | Now OK
E3 some shrivelled leaves | Now OK
F1 small shrivelled leaves | Not so bad now
F6 some shrivelled leaves | Now OK
G6 several shrivelled leaves | Not so bad now
H2 most leaves have gone
a few leaves struggling.
| Still same
H3 some shrivelled leaves | Now OK
K5 some shrivelled leaves | Now OK
N5 shrivelled lower leaves | Now OK
N8 runt but trying | Poor
O5 small leaves | Not too bad
O8 many small shrivelled leaves | A bit poor
V2 many small leaves | Not too bad
V3 a few shrivelled leaves | Now OK
W4 most leaves shrivelled. | Now OK
W6 all leaves small, curled, shrivelled. | Now OK
X6 some leaves shrivelled | Now OK
Y1 many leaves small & shrivelled | Not too bad
Y4 many leaves bent & shrivelled | Now OK
Y8 some leaves eaten | Now OK
Z3 all leaves small & shrivelled. | Now OK
Z6 DEAD. | Replaced
Za1 a few leaves shrivelled | Now OK
Za2 a few black tips | Now OK
Za3 a few black tips | Now OK
Za5 some leaf shrivel | Now OK
Zb2 leaves chewed | Now OK
Zb3 leaves shrivelled | Now OK
Zb6 leaves shrivelled | Not too bad
Zb7 leaves shrivelled, poor runt | Now OK
Zc3 black tips lower down | Now OK
WG very backward and small. | Not too many leaves

The vole solution

The best solution we have to stop field voles eating our saplings is: use herbicide to make a bare patch in the grass around each tree, and set up kestrel boxes in trees in the hedgerow.
For herbicide we use 360 g/l glyphosate, bought from Ebay in 1 litre containers. Added to water and applied from watering can on 1 square metre around each sapling just before leafing. Produces a very efficient bare patch which lasts until the winter.
An average family of 4.65 kestrel chicks plus 2 parents need 276 voles in the 30 days between hatching and fledging. We have 2 boxes, in 2007 one had 6 chicks.
Voles eaten by chicks depends on chicks bodyweight. Just after hatching they eat ¼ vole per day, just before flying they need 2 voles per day.
Adult Kestrels can spot voles in the bare patch, the voles know this and keep away from the trees.
Kestrel chick 2007

This kestrel chick was fed 32 voles in 30 days before he left the nest!
He, his 5 siblings, and 2 parents needed 325 voles in the month before the youngsters left their box in the dead ash tree in the oak plantation. The voles would have killed saplings by eating their bark and roots. How many of our young oaks have been saved this way?
Field vole Microtus agrestris

Habitat: mainly open, grassy habitats with dense ground cover. Particularly likes overgrown fields with damp tussocky grass. Also found on moors and in hedgerows.
Description: mouse-like but blunter nose, shorter tail & less prominent ears. Yellowy-brown fur.
Size: head and body, about 10cm; tail, 4cm.
Life-span: about one year.
Food: mainly grasses; also bulbs, roots and tree bark. Occasionally insects, snails and other invertebrates.
Field Vole Habits. Territory field voles, active by day and night, are aggressive and each one has its own small territory which it fiercely defends from other voles. They fight noisily, uttering loud squeaks and angry chattering noises. Each vole makes runways amoung the grass stems, usually centered on a tussock where it nests.
A favourite habitat is a young foresty plantation where there is lush, undisturbed grass. But after a few years, the trees have grown so much that they cast a dense shade and the grass dies, forcing the voles to go somewhere else. Some manage to live on the grassy fringes, from where they can quickly recolonise grassy areas that begin to grow once more trees are felled.
Breeding. The field vole's breeding season is mainly March to September, although they may continue breeding into December. Four to six young are born in a nest of dry grass, usually hidden in a thick grassy tussock. The babies have grown their fur by ten days old and are weaned at around sixteen days. Young females are ready to mate at six weeks old.
Plagues: Field voles are one of the most numerous British mammals and because they are prolific breeders, populations in a favourable habitat often increase to number in their thousands - a vole plague. When this happens, competition for space and food and heightened aggression leads to less successful breeding, with the result that the population rapidly declines. The fluctuations in populations usually occur in 3-5 year cycles. Some predator populations also increase as the vole populations increase. For example, field voles are the main food of barn owls, forming 90 percent of their diet. A shortage of voles has an effect on the number of young barn owls reared.

Acorn census


[few acorns], [[lots of acorns]], 30 Aug 2010. Upper case=OAK, w=willow, ash=ash,
co=conker, sp=spindle, bi=birch, asp=aspen, Pm=poplar male, Pf=poplar female.
 *=deer-chewed, x potted spares in leaf, xxx=new hedge, ^=leaf soon, ?=un-moved
   w  w  w  w  w  w  w  w  w  w  w  w  w  w  w  w  w  w  w  w  w  w  w  w  w  w   
 GATE ----------------|
  ash                 |                                                      ash
  ash   A1       A2   |   A3       A4       A5       A6       A7       A8    ash
  ash                 |                                                       Pf
  ash   B1       B2   |   B3       B4      [B5]      B6       B7       B8    ash
   NB                 |                                                      ash
       [C1]     [C2]  | [[C3]]     C4      [C5]    [[C6]]     C7       C8    ash
   NC                 |                                                      ash
       [D1]      D2   |   D3       D4      [D5]     [D6]     [D7]      D8    ash
  [ND]                |                                                      ash
       [E1]      E2   |   E3       E4       E5      [E6]      E7      [E8]     
  [NE]                |                                                      Pm
        F1      [F2]  |   F3      [F4]      F5       F6      [F7]     [F8]     
 [[NF]]               |                                                        
       [G1]      G2   |  [G3]      G4      [G5]      G6      [G7]      G8    Pf
  [NG]                |                                                        
       [H1]      H2   |   H3      [H4]      H5     [[H6]]   [[H7]]     H8      
   NH                 |                                                      Pm
      [[I1]]    [I2]  | [[I3]]     I4      [I5]     [I6]     [I7]      I8      
   NI                 |                                                      Pf
        J1      [J2]  |  [J3]      J4      [J5]     [J6]      J7       J8      
  [NJ]                |                                                      Pm
       [K1]     [K2]  |   K3      [K4]      K5      [K6]    [[K7]]     K8      
   NK                 |                                                      Pf
      [[L1]]     L2   |  [L3]     [L4]     [L5]    [[L6]]     L7       L8      
   NL                 |                                                      Pm
        M1      [M2]  |   M3      [M4]     [M5]     [M6]     [M7]      M8      
   NM                 |            sp                                        Pm
        N1      [N2]  |  [N3]   bi w.       N5       N6      [N7]      N8    se
   NN                 |      sp w POND w sp                                  at
       [O1]     [O2]  |   .       WELL   bi O5      [O6]     [O7]      O8    Pm
 [[NO*]]              |                                                        
        P1      [P2]  | SCRAPE    [P4]     [P5]     [P6]     [P7]     [P8]   Pf
   NP                 |       |---------|                                      
      [[Q1*]]   [Q2]  |   Q3  |   [Q4]  |  [Q5]      Q6       Q7       Q8      
   NQ                 |       | NURSERY |                                    Pm
        R1      [R2]  |  [R3] |   [R4]  |  [R5]      R6       R7       R8      
   NR                 |       |         |                                    Pf
        S1      [S2]  |   S3  |    S4   | [[S5]]     S6       S7      [S8]     
   NS                 |       |---------|                                    Pm
       [T1*]     T2   |  [T3]     [T4]     [T5]      T6      [T7]      T8      
   NT                 |---------|                                            Pf
       [U1*]    [U2]      U3    |  U4       U5      [U6]     [U7]      U8      
   NU                           |                                              
        V1*      V2       V3    |  V4       V5      [V6]     [V7]      V8    Pm
   NV                           |                                              
        W1      [W2]     [W3]   |  W4       W5       W6       W7      [W8]     
   NW                           |                                            Pf
       [X1]      X2       X3    |  X4      [X5]      X6       X7       X8      
   NX                           |                                            Pm
        Y1       Y2       Y3    |  Y4      [Y5]     [Y6]      Y7       Y8      
   NY                           |                                            Pf
       [Z1*]   [[Z2]]     Z3    |  Z4       Z5       Z6       Z7       Z8      
   NZ                           |                                            Pm
        Za1*    [Za2]     Za3   | [Za4]     Za5      Za6     [Za7]     Za8     
  [NZa]                         |                                             x
       [Zb1*]    Zb2      Zb3   |  Zb4      Zb5      Zb6      Zb7      Zb8    x
x  NZb                          |                                             x
x ash* [Zc1]    [Zc2]    [Zc3]  |  Zc4      Zc5      Zc6      Zc7      Zc8    x
x                               |                                             x
x ash   ash* WA       co     co |  co    co      asp      WF                  x
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Compiled, hand coded and copyright © 2008, John Palmer, All Rights Reserved.