Growing Food: A Guide to Food Production

INDEX 331

Nitrates 6–8, 20, 27, 29, 30, 32
Nitrobacter 7
Nitrogen 25, 29

• Cycle 6–8


• fixation 54


• flush / Birch effect 33
  Nitrosomonas 7

OatsAvena sativa125–127
OcaOxalis tuberosa 204
Off-type plants 45
Oilseed Crops 189–203
OkraAbelmoschus esculentus
231–233
Oleaceae (Olive family) 244
OnionAllium cepa234–237
Organic fertiliser 30–31
Organic matter 12
Ovary, ovule 2

Pomelo (Shaddock) 254 , 255, 305, 308
PRA—Participatory Rural Appraisal
317
Papain 262, 263
Papaya/PawpawCarica papaya
261–263
Parthenocarpy 3
Peanut/GroundnutArachis hypogaea
164–167
Pearl/Bulrush Millet Pennisetum
typhoides 120
Peas—see Field Pea
Pellagra 118
PeppersCapsicum spp. 237–239
Perennial plants 36
Permanent wilting point 9

Phosphorus 25
Photoperiodism/Day Length 42
Photosynthesis 5, 27, 39 , 106
Pigeon Pea 179–181
Pioneer crops 64
Pistil/Pistillate 1, 2

Plant density 4

• food ratio 32


• population/spacing 4


• propagation 1
  Plantains 168, 247, 248 , 252
  Poaceae [Graminae] (Grass family)
  128, 142, 143, 221
  Pollen 1 ,114–115, 152, 243, 245, 270
  Pollination1–3, 41, 114, 133, 137,
  156, 246, 282
  Potassium 26
  PotatoSolanum tuberosum208–212
  Poultry manure 31
  Precocious varieties 43

Pulses—see Legumes

Pumpkin 229

Pyrethrum 79, 80

Radicle 6

Ragi—see Finger Millet

Recalcitrant seed 51

Respiration 39

Rhizobia 54–55

Rhizome 41

RiceOryza sativa128–132

Ricin 190, 192

Rogue plants 45

Root Crops 204–220

Root System 6

Rosaceae (Rose family) 244

Rotation of crops 65–66, 107–287

Rotenone 65, 79 , 80,163

Rutaceae (Citrus fruit family) 244

Rutin 112

RyeSecale cereale133–135

SI System of measurement 313

SafflowerCarthamus tinctorius 189 ,

196, 294

Sainfoin (Onobrychis viciaefolia) 21,

73

Saline soil 15–17

Protandry/Protogyny 3

pH value 20–23