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Agriculture for Secondary Schools



              Milk yield                               Nutrient management
                the amount of milk produced by a         the practice of adding Fertilisers and
                cow                                      other soil additives to ensure crops
                                                         receive the proper nutrients they need
              Milling                                    to grow healthy and strong
                grinding grains into flour
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                                                       Oestrus
              Minerals                                   a  period  of  sexual  receptivity  of
                natural nutrients found in soil, feed    female  mammals  during  which
                or fertilisers that help animals and     ovulation takes place
                plants grow strong and healthy
                                                       Open-Pollinated Varieties (OPV)
              Moisture retention (for soil)               in maize production refer to maize
                the ability of soil to hold water        varieties that reproduce naturally
                                                         through cross-pollination by wind or
              Mulching
                covering the soil with materials such    insects. Unlike hybrids, OPVs allow
                                                         farmers to save seeds for replanting
                as grass, leaves or straw, to conserve
                moisture, suppress weeds and regulate    while maintaining genetic diversity
                soil temperature                       Organic manure

              Neem                                       Natural fertiliser derived from
                                                         decomposed plant and animal
                a natural plant whose leaves and oil
                can be used to protect crops from        materials, such as compost, farmyard
                                                         manure, or green manure, used to
                insect pests
                                                         improve soil fertility
              Nitrogen fixation                        Parturition
                a natural process where  legumes
                take nitrogen from the air and make      the act of giving birth in mammals
                it available to the soil               Pasteurisation

              Nose-ringing                               the process of heating milk to kill
                                                         harmful germs without changing its
                placing a ring in a bull’s nose to make
                handling safer and easier, usually       taste
                done when the bull is 15 to 18 months   Pea weevil
                old                                      a pest that damages peas by laying
                                                         eggs on pods; the larvae eat the seeds
              NPK fertiliser
                a type of Fertiliser containing nitrogen   inside
                (N), phosphorus (P), and potassium     Pest
                (K) to help plants grow well             an insect or animal that damages
                                                         crops
              Nutrient deficiency
                lack of essential nutrients in the soil   Pneumonia
                or plants                                a form of serious respiratory illness
                                                         that affects the lungs, characterised


             242                                                    Student’s Book Form Three





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