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Extracts of the roots of Hyparrhenia filipéndula and other grasses were tested against soil enrichment cultures of NH3-and NO2 oxidizers, by measuring...
Read moreOn rainy days when foliage was wet, total evaporation from the plantation exceeded Eo (potential evaporation from an open water surface). It was less ...
Read moreMasses of vegetation, litter and humus and their C and N contents, population densities of bacteria, fungi and arthropods, and respiration rates, mois...
Read moreA heat-labile substance in surface sterilized pieces of Hyparrhenia filipendula roots was toxic to nitrite oxidizers in a soil enrichment culture; it ...
Read moreAn outline balance sheet for water, Na, K, Ca, P and N was constructed for a stream catchment of 83 ha. The catchment surface comprised 11-20% eroding...
Read moreThe following is based largely on the author's summary of this account of laboratory investigations in Kenya [cf. RAE A 54 394]. Dust formulations of ...
Read moreThe following is based largely on the author's summary. The amount of damage caused by locusts and grasshoppers is a function of a number of complex v...
Read moreThe 33 papers read at this meeting are presented, all with summaries in French and German. The following are among those of concern to economic entomo...
Read moreThis paper is one of a number on the effects on wildlife of contamination of the environment by pesticides that were presented at a conference in Engl...
Read moreSince its introduction from Europe to the Pacific coast of North America, Scotch broom has spread and has become a weed. The main broom sites in Calif...
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