Numerous grass species are used as pasture and cover crops in crop rotation systems in South Africa. A wide range of weed species are also present in local cropping systems and adversely affect crop production. The identification of the economically important nematode pests that are associated with...
Both the upper and lower surfaces of leaves are densely covered with tiny hairs and this is its most recognizable feature. An annual plant that produces ample seeds each year to ensure its survival in a patch of the garden. Regarded as a weed in the west of the USA. 3 . Can you name...
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The first part of this book contains an account of the general morphology and classification of grasses and keys to the identification of species in the sub-family Panicoideae. This part is written in English, German, French and Spanish. The main section of the book gives the morphological ...
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13.Research on the Effects of Environmental Factors on the Activity of Nitrogen Fixing Bacteria in the Rhizosphere of Aneurolepidium chinensis and Agropyron mongolicum环境因子对羊草和冰草根际固氮菌活性的影响 14.Allelopathy of Root Exudates of Onobrychis viciaefolia on 7 Kinds of Weed红豆草根系分泌物...
grass泛指为草的时候为不可数，但是指两种草的种类的时候是可数名词。具体释义如下：grass 英 [grɑ:s] 美 [græs]n.草，青草;草地，草坪;告密者;〈俚〉龙须菜 vt.用草覆盖;使…长满草;使…吃草 vi.渐渐被草覆盖;放牧 1、grass的基本意思是“草”,指各种草的总称,通常长有绿色的...
Remove existing weeds.Overgrown weedscompete with your turf for space, light, moisture, and nutrients. A severe weed invasion can weaken your turf and make it vulnerable to pests and disease. Apply pre-emergent herbicide.You can help prevent weeds from popping up by applying apre-emergent herbic...
This publication, primarily intended for the practical worker, is a guide to the identification of 46 common broad-leaf weeds and grasses of arable land. A brief, illustrated description of each weed is given, and those species which are susceptible to harrowing are noted.-J.L.M.关键词:arab...
Identification of phytotoxic substances from early growth of barnyard grass (Echinochloa crusgalli) root exudates. 来自 掌桥科研 喜欢 0 阅读量: 120 作者:TD Xuan,IM Chung,TD Khanh,S Tawata 摘要: Barnyard grass is a problematic weed worldwide. It competes with crops and causes reduction in crop...